CT-CID803 PLUS Caller ID Box Call Blocker Stop Nuisance Calls Devices Call ID LCD Screen Display with 1500 Numbers Capacity Stoping All Cold Calls for Fixed Phones Antique Landline Telephone (Random Delivery in New and Old Model) Manually enter or remove numbers to/from Blocking list. This will block all calls without caller ID. You can choose 1-Ring or 0-Ring for blocked calls. Todeleteablockednumbers.Hit"BLOCK"buttonfirst,thenhitLeftorRightarrowtoviewblacklist. number and press DELETEtwicequickly. DONEshouldshowindicatingremovalofnumberfromblockedcalls. Block nuisance or unwanted calls to 1000-1500 groups. Limited to 10 Groups) This device is a kind of powerful multi-function call blocker which can block numbers added to blacklist, with call Blocker, your world finally get quiet. Specifications: Color: Black Type: Caller Blocker Material: ABS Package weight: Approx.124g / 4.4oz Product weight: Approx.87g / 3.1oz LCD Display: Backlight Keys: SET, OUT, BLACKLIST, REMOVE, / DOWN Model: CT-CID803 PLUS Product size: Approx.10 * 8.6 * 4.4cm / 3.9 * 3.2 * 1.7in Package size: Approx.10.2 * 9.5 * 5cm / 4 * 3.7 * 2in * Note: 1. This product requires Caller service from your network provider. All calls without Caller will be rejected directly. 2. new and old model differ in pattern, and they are in random delivery. Package List: 1 * User Manual (English) 1 * Network Cable 1 * Caller Blocker LCD display: Date, Time and Week. 5 levels of LCD brightness adjustable. Reviewing and deleting of numbers in blacklist. Automatic recognization of Tone/Pluse model. Blacklists & whitelists of switchable. Automatic recognization of Tone/Pluse model.